@article{3270,
author = {Merris, Russell},
title = {The number of eigenvalues greater than two in the Laplacian spectrum of a graph},
journal = {Portugaliae mathematica},
volume = {48},
year = {1991},
pages = {345-349},
zbl = {0731.05037},
mrnumber = {1127131},
language = {en},
url = {http://dml.mathdoc.fr/item/3270}
}
Merris, Russell. The number of eigenvalues greater than two in the Laplacian spectrum of a graph. Portugaliae mathematica, Tome 48 (1991) pp. 345-349. http://gdmltest.u-ga.fr/item/3270/